Mikaeus, the Unhallowed + Shilgengar, Sire of Famine

Mikaeus, the Unhallowed

Shilgengar, Sire of Famine

How it works

1. Activate Shilgengar by sacrificing the creature with persist.
2. When that creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Resolve the Shilgengar ability.
4. Activate Shilgengar by sacrificing the persist creature.
5. When the persist creature dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Shilgengar ability.
7. Repeat.